docs: def get_urls(self):
          """
          Add the export view to urls.
          """
          urls = super(FormSubmissionAdmin, self).get_urls()
          from django.conf.urls import url
  
          def wrap(view):
              def wrapper(*args, **kwargs):
                  return self.admin_site.admin_view(view)(*args, **kwargs)
              return update_wrapper(wrapper, view)
  
          info = self.model._meta.app_label, self.model._meta.model_name
  
          extra_urls = [
              url(r'^export/$', wrap(self.export_view), name='%s_%s_export' % info),
          ]
          return extra_urls + urls